{
  "manageEntity": {
    "action": "Save",
    "entityId": "326505",
    "entityType": "Track",
    "nonce": "0xd23bd7a7cf632c0ff218476e7639160639978f1be2597ff365c3d82d6bda727d",
    "signature": "0xe1f2dd01576ed7e6c9c6bc64423a7abdff3222589e1c2cf815505477413939c83aa82e94f84e52373fdc1465248d678523777c36b5caa953b621a12bb3fab34e1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}